Code 55 Diagnosis Help

[Athens91ZR1]

Hello all,

I have a code 55 presently (lean AFR).

Here is what I have done so far:

- Jumpered the fuel pump underhood connector to the battery via a VOM and got 9.1A (fuel pumps pass electrical test)

- Connected fuel pressure gauge to service port on fuel rail and found the following when key was turned to the ON position:

FP1 pulled - 50 psi (tapering to 45)
FP2 pulled - 36-38 psi

**Fuel filter replaced in late 2013 but no record of fuel pump replacement in the past**

Do I just assume that the primary fuel pump is bad or has a loose connection somewhere? Or could it still be the fuel filter?

If you think I should just plan to replace both fuel pumps, please advise what you think would be the best new pump.

Thank you!
Jordan